The latch is a DeStaCo latch that i ordered from McMaster Carr, it's stainless steel and rated to like 700 lbs. It's positive locking. I like this latch and wouldn't do anything different if I did it over.

The hinge is a rockstomper spindle hinge. it works perfect and i wouldn't change it either. if you havent' selected a hinge I would HIGHLY recommend a rockstomper hinge.

The whole thing

Search McMaster Carr for "Draw Pull Latches" for several choicesMcMaster-Carr